Friends of actor and writer Jack Larson (above, with George Reeves) will gather at the UCLA James Bridges Theatre on December 6. Larson, who played Jimmy Olsen in “Adventures of Superman” in the 1950s, died in September. The theater, named in honor of Larson’s late partner film director-writer James Bridges, is located in the Department of Film, Television and Digital Media building on the north end of the UCLA campus. The memorial begins at 5 p.m. Doors will open at 4 p.m. Parking is in UCLA lot 3.